{"id":"CVE-2021-23845","aliases":["EUVD-2021-10771","GHSA-4fvc-h857-qw9g"],"status":"published","title":"B426 Web Configuration Authentication Bypass","description":"This vulnerability could allow an attacker to hijack a session while a user is logged in the configuration web page. This vulnerability was discovered by a security researcher in B426 and found during internal product tests in B426-CN/B429-CN, and B426-M and has been fixed already starting from version 3.08 on, which was released on June 2019.","severity":{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00839,"percentile":0.58101,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-284"],"published":"2021-06-18T13:38:31Z","modified":"2026-06-17T03:38:55Z","products":[{"vendor":"bosch","product":"b426 firmware"},{"vendor":"bosch","product":"b426-cn/b429- cn firmware"},{"vendor":"bosch","product":"b426-cn_firmware"},{"vendor":"bosch","product":"b426-m firmware"},{"vendor":"bosch","product":"b426-m_firmware"},{"vendor":"bosch","product":"b426_firmware"},{"vendor":"bosch","product":"b429-cn_firmware"}],"references":[{"url":"https://psirt.bosch.com/security-advisories/bosch-sa-196933-bt.html","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23845"},{"url":"https://github.com/advisories/GHSA-4fvc-h857-qw9g"}],"sources":{"cve":[{"id":"CVE-2021-23845","title":"B426 Web Configuration Authentication Bypass","description":"This vulnerability could allow an attacker to hijack a session while a user is logged in the configuration web page. This vulnerability was discovered by a security researcher in B426 and found during internal product tests in B426-CN/B429-CN, and B426-M and has been fixed already starting from version 3.08 on, which was released on June 2019.","status":"published","published":"2021-06-18T13:38:31.304Z","modified":"2024-09-16T21:57:38.685Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:33:00.819444Z"}],"euvd":[{"id":"EUVD-2021-10771","description":"This vulnerability could allow an attacker to hijack a session while a user is logged in the configuration web page. This vulnerability was discovered by a security researcher in B426 and found during internal product tests in B426-CN/B429-CN, and B426-M and has been fixed already starting from version 3.08 on, which was released on June 2019.","status":"published","published":"2021-06-18T13:38:31Z","modified":"2024-09-16T21:57:38Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:55:07.221362Z"}],"ghsa":[{"id":"GHSA-4fvc-h857-qw9g","title":"This vulnerability could allow an attacker to hijack a session while a user is logged in the...","description":"This vulnerability could allow an attacker to hijack a session while a user is logged in the configuration web page. This vulnerability was discovered by a security researcher in B426 and found during internal product tests in B426-CN/B429-CN, and B426-M and has been fixed already starting from version 3.08 on, which was released on June 2019.","status":"published","published":"2022-05-24T19:05:39Z","modified":"2023-01-29T05:07:02Z","updated_at":"2026-11-02T14:46:08.233339Z"}],"nvd":[{"id":"CVE-2021-23845","description":"This vulnerability could allow an attacker to hijack a session while a user is logged in the configuration web page. This vulnerability was discovered by a security researcher in B426 and found during internal product tests in B426-CN/B429-CN, and B426-M and has been fixed already starting from version 3.08 on, which was released on June 2019.","status":"published","published":"2021-06-18T14:15:07.907Z","modified":"2026-06-17T03:38:55.237Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:06:54.892562Z"}]}}